Reactive intermediate phase cold sintering in strontium titanate

R. Boston, J. Guo, S. Funahashi, A. L. Baker, I. M. Reaney, Clive A. Randall

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Dense (>96% theoretical) strontium titanate ceramics were fabricated at 950 °C (conventional sintering temperature > 1400 °C) using a reactive intermediate phase cold sintering process. An aqueous solution of SrCl2 mixed with TiO2 nanoparticles was added to SrTiO3 powders and pressed at 180 °C to obtain a highly compacted green body. During the post-press heating step at 950 °C, the TiO2 and SrCl2 create in-filling micro-reactions around each grain resulting in dense (>96%) SrTiO3 ceramics. Nano- and micron-sized starting powders were used, demonstrating that this reactive intermediate phase cold sintering route can densify a wide range of starting powder sizes, as it not reliant on an amorphous-to-crystalline precipitation through the terrace ledge kink mechanism, as has been identified repeatedly in previous cold sintering mechanisms. Moreover, this process has the potential to densify a wide variety of functional oxides, as a range of different low-temperature chemical synthesis routes could be used.

Original languageEnglish (US)
Pages (from-to)20372-20378
Number of pages7
JournalRSC Advances
Volume8
Issue number36
DOIs
StatePublished - Jan 1 2018

Fingerprint

Strontium
Sintering
Powders
Oxides
Nanoparticles
Crystalline materials
Heating
Temperature
strontium titanium oxide

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)

Cite this

Boston, R., Guo, J., Funahashi, S., Baker, A. L., Reaney, I. M., & Randall, C. A. (2018). Reactive intermediate phase cold sintering in strontium titanate. RSC Advances, 8(36), 20372-20378. https://doi.org/10.1039/c8ra03072c
Boston, R. ; Guo, J. ; Funahashi, S. ; Baker, A. L. ; Reaney, I. M. ; Randall, Clive A. / Reactive intermediate phase cold sintering in strontium titanate. In: RSC Advances. 2018 ; Vol. 8, No. 36. pp. 20372-20378.
@article{9abd648fe9cf493e9b38b5ae49689bd7,
title = "Reactive intermediate phase cold sintering in strontium titanate",
abstract = "Dense (>96{\%} theoretical) strontium titanate ceramics were fabricated at 950 °C (conventional sintering temperature > 1400 °C) using a reactive intermediate phase cold sintering process. An aqueous solution of SrCl2 mixed with TiO2 nanoparticles was added to SrTiO3 powders and pressed at 180 °C to obtain a highly compacted green body. During the post-press heating step at 950 °C, the TiO2 and SrCl2 create in-filling micro-reactions around each grain resulting in dense (>96{\%}) SrTiO3 ceramics. Nano- and micron-sized starting powders were used, demonstrating that this reactive intermediate phase cold sintering route can densify a wide range of starting powder sizes, as it not reliant on an amorphous-to-crystalline precipitation through the terrace ledge kink mechanism, as has been identified repeatedly in previous cold sintering mechanisms. Moreover, this process has the potential to densify a wide variety of functional oxides, as a range of different low-temperature chemical synthesis routes could be used.",
author = "R. Boston and J. Guo and S. Funahashi and Baker, {A. L.} and Reaney, {I. M.} and Randall, {Clive A.}",
year = "2018",
month = "1",
day = "1",
doi = "10.1039/c8ra03072c",
language = "English (US)",
volume = "8",
pages = "20372--20378",
journal = "RSC Advances",
issn = "2046-2069",
publisher = "Royal Society of Chemistry",
number = "36",

}

Boston, R, Guo, J, Funahashi, S, Baker, AL, Reaney, IM & Randall, CA 2018, 'Reactive intermediate phase cold sintering in strontium titanate', RSC Advances, vol. 8, no. 36, pp. 20372-20378. https://doi.org/10.1039/c8ra03072c

Reactive intermediate phase cold sintering in strontium titanate. / Boston, R.; Guo, J.; Funahashi, S.; Baker, A. L.; Reaney, I. M.; Randall, Clive A.

In: RSC Advances, Vol. 8, No. 36, 01.01.2018, p. 20372-20378.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Reactive intermediate phase cold sintering in strontium titanate

AU - Boston, R.

AU - Guo, J.

AU - Funahashi, S.

AU - Baker, A. L.

AU - Reaney, I. M.

AU - Randall, Clive A.

PY - 2018/1/1

Y1 - 2018/1/1

N2 - Dense (>96% theoretical) strontium titanate ceramics were fabricated at 950 °C (conventional sintering temperature > 1400 °C) using a reactive intermediate phase cold sintering process. An aqueous solution of SrCl2 mixed with TiO2 nanoparticles was added to SrTiO3 powders and pressed at 180 °C to obtain a highly compacted green body. During the post-press heating step at 950 °C, the TiO2 and SrCl2 create in-filling micro-reactions around each grain resulting in dense (>96%) SrTiO3 ceramics. Nano- and micron-sized starting powders were used, demonstrating that this reactive intermediate phase cold sintering route can densify a wide range of starting powder sizes, as it not reliant on an amorphous-to-crystalline precipitation through the terrace ledge kink mechanism, as has been identified repeatedly in previous cold sintering mechanisms. Moreover, this process has the potential to densify a wide variety of functional oxides, as a range of different low-temperature chemical synthesis routes could be used.

AB - Dense (>96% theoretical) strontium titanate ceramics were fabricated at 950 °C (conventional sintering temperature > 1400 °C) using a reactive intermediate phase cold sintering process. An aqueous solution of SrCl2 mixed with TiO2 nanoparticles was added to SrTiO3 powders and pressed at 180 °C to obtain a highly compacted green body. During the post-press heating step at 950 °C, the TiO2 and SrCl2 create in-filling micro-reactions around each grain resulting in dense (>96%) SrTiO3 ceramics. Nano- and micron-sized starting powders were used, demonstrating that this reactive intermediate phase cold sintering route can densify a wide range of starting powder sizes, as it not reliant on an amorphous-to-crystalline precipitation through the terrace ledge kink mechanism, as has been identified repeatedly in previous cold sintering mechanisms. Moreover, this process has the potential to densify a wide variety of functional oxides, as a range of different low-temperature chemical synthesis routes could be used.

UR - http://www.scopus.com/inward/record.url?scp=85048089066&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85048089066&partnerID=8YFLogxK

U2 - 10.1039/c8ra03072c

DO - 10.1039/c8ra03072c

M3 - Article

VL - 8

SP - 20372

EP - 20378

JO - RSC Advances

JF - RSC Advances

SN - 2046-2069

IS - 36

ER -

Boston R, Guo J, Funahashi S, Baker AL, Reaney IM, Randall CA. Reactive intermediate phase cold sintering in strontium titanate. RSC Advances. 2018 Jan 1;8(36):20372-20378. https://doi.org/10.1039/c8ra03072c